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矿山锚杆钻机支护施工工艺与质量控制要点

发布时间:2026-08-10 19:53人气:
锚杆钻机是矿山巷道支护的核心设备,其钻孔精度、施工工艺直接决定巷道支护质量,关系井下开采安全。锚杆锚索支护施工工艺标准化、质量管控精细化,能够有效提升巷道围岩稳定性,减少顶板下沉、巷帮变形、围岩开裂等问题,为井下安全生产提供保障。
施工前期准备与孔位精准定位。支护施工前,根据巷道支护设计方案,精准标记锚杆、锚索钻孔位置、深度、角度,严格按照设计参数施工,杜绝孔位偏移、角度偏差、深度不足等问题。提前清理巷道顶板、侧帮浮石、松动岩块,平整施工区域,检查锚杆钻机运行状态,调试设备回转速度、钻进压力,准备适配规格的钻杆、钻头、锚杆锚索配件,确保施工顺利推进。针对破碎围岩巷道,需先进行临时支护,再开展钻孔作业,防止钻孔过程中围岩坍塌。
标准化钻孔施工工艺。开机后低速对位,平稳钻进,顶板钻孔采用垂直向上钻进模式,巷帮钻孔保持水平合规角度,钻进过程中匀速推进,避免压力忽大忽小导致孔壁凹凸不平、孔径偏差。钻孔达到设计深度后,不可立即退钻,保持低速回转3-5秒,彻底清理孔内残留岩渣,保证孔道干净通畅,为后续锚杆安装、注浆锚固奠定基础。钻孔完成后及时检查孔径、孔深、角度,不合格钻孔需重新补钻,严禁敷衍施工。
支护施工与质量管控核心要点。钻孔验收合格后,及时安装锚杆、锚索,确保配件安装到位、贴合紧密,注浆施工时保证注浆饱满、密实,无空洞、无漏浆。施工完成后,定期检测支护锚固力,抽检锚杆锚索受力状态,确保支护强度符合矿井安全标准。日常质量管控中,重点排查孔位偏差、钻孔深度不足、岩渣清理不彻底、注浆不密实等常见问题,规范操作人员施工动作,杜绝简化工序、违规作业。同时根据巷道围岩变化,动态调整施工参数,破碎、松软围岩适当加密钻孔、加深锚固深度,全方位保障巷道支护质量。

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